Cause of Border Patrol’s agent death remains a mystery, law enforcement sources say

iStock/Thinkstock(WASHINGTON) — The injuries that left one Border Patrol agent dead and another severely injured in Texas remain a mystery, law enforcement sources told ABC News.

Authorities are looking into the possibility that this was an accident, the sources added.

The investigation stems from the discovery of two Border Patrol agents found at the bottom of a ravine. They were there near midnight responding to a sensor triggered in the area. Due to the lack of concrete evidence in the case, authorities are staying open to the possibility that the two agents may have accidentally slipped off the ravine, leading to them sustaining such serious injuries, the sources said.